|Breeder||Marylou Whitney Stables|
|Owner||Marylou Whitney Stables|
Triple Crown race wins:
Belmont Stakes (2004)
|NTRA "Moment of the Year" (2004)|
|Last updated on June 18, 2007|
Owned and bred by Marylou Whitney of Whitney family racing fame, Birdstone won the Champagne Stakes, a leading race for two-year-olds, at Belmont Park in 2003, but was not a factor in the first two Triple Crown races (finishing eighth in the Kentucky Derby and skipping the Preakness Stakes) and was a 36-1 longshot when he upset the overwhelmingly favored Smarty Jones, taking the lead in the final furlong (201 m) in the fastest Belmont since the advent of modern electronic timing (2002 was the first year times were kept to hundredths).
His sire Grindstone won the Kentucky Derby in 1996 and was a son of 1990 Derby winner Unbridled. Unbridled was in turn sired by Fappiano, a son of Mr. Prospector, the tail-male ancestor of the vast majority of winners of Triple Crown races in recent years (22 out of the 24 races 1998-2005).
Birdstone's victory represented the first in the Belmont for trainer Nick Zito, whose horses had finished second in that classic five times. In the winner's circle after the Belmont Stakes, his owners apologized to the connections of Smarty Jones for winning, as did jockey Edgar Prado.
His first starter was the colt Shoe Strap (Birdstone - Boot Strap by Storm Boot), who first went to post on May 21, 2008, at Churchill Downs and is trained by D. Wayne Lukas. Birdstone also sired Mine That Bird, who had several wins as a two-year-old gelding before winning the 2009 Kentucky Derby as a three-year-old. Another of Birdstone's top runners was Summer Bird, who upset Mine That Bird in the 2009 Belmont Stakes. His first crop also included Birdrun, who set the Belmont track record at a mile and a sixteenth  and repeated his sire's feat by winning the Travers as well. Summer Bird later won the 2009 Jockey Club Gold Cup.
Birdstone was one of the top ten ranked freshman sires of 2008 with 11 winners out of 22 starters and stood for $10,000 for the remainder of the 2009 season, despite his first-crop success. His 2010 stud fee was posted as $30,000 but by 2017 it had fallen to $5,000.